2615 results about "Hydroquinone Compound" patented technology

A bioengineered synthesis scheme for the production of quinic acid from a carbon source is provided. Methods of producing quinic acid from a carbon source based on the synthesis scheme as well as conversion of quinic acid to hydroquinone are also provided.

Disclosed is a photo-curable conductive adhesive and method for preparation, which is prepared from light-sensitive high molecular polymer, reactive dilution monomer, conducting particles, light-summing heat initiating agent and anti-oxidant through mixing and grinding, wherein the light-sensitive high molecular polymer is epoxy acrylic resin or / and polyurethane-acrylate, the reactive dilution monomer is the single, double and multiple functional monomers of acrylic acid, the conducting particle is silver powder, copper powder or silver-plated copper powder, the light initiating agent is alpha-amine alkyl methyl ketone, benzoin (or substituted benzoin) ether or acyl phosphines, the heat initiating agent is azocompound or peralcohol, the antioxidant is hydroquinone, p-hydroxybenzene methyl ether, 2,6-ditertiary-butyl-4-methylphenol.

The invention relates to a gel plugging agent for deep profile control of a higher temperature oil reservoir, and a preparation method of the gel plugging agent. The gel plugging agent comprises 0.3-0.8 percent of nonionic polyacrylamide, 0.6-1.3 percent of a cross-linking agent A, 0.45-1.44 percent of a cross-linking agent B, 0.02-0.04 percent of a temperature stabilizer and 0.01-0.08 percent of a pH value regulator, wherein the cross-linking agent A is methenamine; the cross-ling agent B is hydroquinone or resorcinol; the temperature stabilizer is sodium thiosulfate, sodium bisulfite or sodium sulfite; and the pH regulator is sodium hydroxide, potassium hydroxide, sodium carbonate or sodium bicarbonate. The gel plugging agent disclosed by the invention has strong temperature resisting performance and can be used for the profile control operation of the high temperature oil reservoir with 100-160DEG C; the gel plugging agent has the characteristics of high strength after being gelatinized, stronger plugging capability for the stratum and favorable thermal stability; and in addition, after the gel plugging agent is stood at the temperature of 130 DEG C for 90 days, the strength change is little and gel breaking and hydration are avoided.

Polycarbonates containing low or undetectable levels of Fries rearrangement products and comprising repeat units derived from one or more of resorcinol, hydroquinone, methylhydroquinone, bisphenol A, and 4,4′-biphenol have been prepared by the melt reaction of one or more of the aforementioned dihydroxy aromatic compounds with an ester-substituted diaryl carbonate such as bis-methyl salicyl carbonate. Low, or in many instances undetectable, levels of Fries rearrangement products are found in the product polycarbonates obtained as the combined result of a highly effective catalyst system which suppresses the Fries reaction and the use of lower melt polymerization temperatures relative to temperatures required for the analogous polymerization reactions using diphenyl carbonate.

The present invention provides a one-piece solid golf ball having excellent rebound characteristics and good shot feel, while maintaining excellent processability and durability. The present invention relates to a one-piece solid golf ball formed from a rubber composition comprising a mixture consisting of polybutadiene (a) synthesized using nickel-containing catalyst and polybutadiene (b) synthesized using cobalt-containing catalyst and hydroquinone or derivatives thereof as a vulcanization stabilizer, wherein a Mooney viscosity and a weight ratio of the polybutadienes (a) and (b), an amount of the vulcanization stabilizer, a center hardness (the minimum hardness in the golf ball) and surface hardness of the golf ball, and a difference between the maximum hardness and minimum hardness in the golf ball are adjusted to a specified range.

The invention discloses a phosphoric-acid-base modified polycarboxylic-acid water reducer with high adaptability and a preparation method thereof. The water reducer is prepared from the following raw materials: isopentenol polyoxyethylene ether, hydrogen peroxide, acrylic acid, an unsaturated phosphoric acid monomer, deionized water, a reducing agent, and a chain transferring agent. The chain transferring agent is one of mercaptoethanol, mercaptoacetic acid and mercaptopropionic acid. The unsaturated phosphoric acid monomer is prepared from 2-phosphono-1,2,4-butanetricarboxylic acid, p-toluenesulfonic acid and hydroquinone. The preparation method for the water reducer comprises adding isopentenol polyoxyethylene ether and deionized water into a reaction vessel, uniformly stirring, heating, keeping warm, adding oxygen peroxide, then dropwise adding a material solution by employing a constant-flow pump, continuing to keep warm for reacting for 1-1.5 h after dropwise adding of the material solution is finished, naturally cooling to room temperature, and adjusting the pH value of the obtained product to 5-6 by using an alkaline solution. The phosphoric-acid-base modified polycarboxylic-acid water reducer possesses good sulfate ion resisting capability and sludge resisting capability, thereby satisfying engineering demand.

The present invention includes methods and compositions for liquid separation and water purification. The present invention includes a purification membrane having a polymer matrix purification membrane that has been treated with hydroquinone, catechol, and / or dopamine coated membrane with a high water flux.

The present invention is directed to an anhydrous topical skin care composition, comprising: hydroquinone and an anhydrous base comprising an anhydrous solvent and a high molecular weight silicone carrier. The composition is substantially free of water which imparts advantageous properties, including smooth feel and long shelf life, to the composition.

A galvanic cell having a cathode, an anode, and an electrolyte. The cathode and anode each have vesicles, an electroactive species encapsulated into the vesicles, a conducting substrate, and functionalized tethers immobilizing the vesicles to the substrates. The electrolyte is in contact with both conducting substrates. At least some of the vesicles contain benzoquinone and / or hydroquinone.

A process for preparing liquid crystal copolyester by solid polymerization includes such steps as heating the prepolymer poly(parahydroxy benzoic acid / 2,6-naphthalenediformic acid / terephthalic acid / hydroquinone) to a temp which is 10-60 deg.c lower than its fusion point, and solid polimerizing reaction under existance of inertial gas.

The present invention features a method for preparing core-shell nanoparticles supported on carbon. In particular, the present invention features a method for preparing core-shell nanoparticles supported on carbon, including: dispersing core nanoparticle powder supported on carbon in ethanol; adding a metal precursor which forms a shell and hydroquinone thereto; and mixing and reducing the same. Preferably, the disclosed method for preparing core-shell nanoparticles supported on carbon enables coating of transition metal nanoparticles including platinum on the surface of core metal nanoparticles at a monolayer level. Prepared core-shell nanoparticles of the present invention may be useful as catalysts or electrode materials of fuel cells.

The invention provides a method for synthesizing a tin-silicon molecular sieve. The method comprises: (1) hydrolyzing an organic silicon source, a tin source and an alkali source template agent to obtain a mixture A and carrying out first crystallization on the obtained mixture A; and (2) mixing the material obtained by first crystallization with an inorganic silicon source to obtain a mixture B and carrying out second crystallization on the obtained mixture B. The invention provides the tin-silicon molecular sieve synthesized through the method and an application of the molecular sieve. The invention provides a phenol hydroxylation method. By taking the inorganic silicon source which is relatively low in price as a part of, or even, a main silicon source, the use level of organosilicone esters is reduced, and the synthetic benefit is improved to a great extent. Moreover, the synthesized tin-silicon molecular sieve is high in relative crystallinity, high in catalytic oxidation activity and high in selectivity, and shows the characteristics of being high in catalytic oxidation activity and high in selectivity on hydroquinone in a probe reaction, i.e. a phenol hydroxylation reaction.

Disclosed are a light-emitting diode, a photovoltaic device, a transistor, and an electroluminescent device, each comprising a layer disposed on a support, the layer comprising a [A] composition exclusive of hydroquinone comprising at least one polymer comprising (3,4-dialkoxythiophene) monomer units, a polyanion, at least one polyhydroxy group-containing aromatic compound exclusive of sulfo groups, at least one amino-compound or heterocyclic compound with at least one ring nitrogen atom, and at least one compound selected from the group consisting of polyhydroxy- and / or carboxy group or amide or lactam group containing aliphatic compounds and aprotic compounds with a dielectric constant ≧15.

The invention relates to a high-temperature-resistant and high-salinity-resistant water-plugging profile control agent, and a preparation method and application thereof. The water-plugging profile control agent comprises polyacrylamide, a composite crosslinking agent, cyclodextrin, metaphenylene diamine and deoxidant, wherein the composite crosslinking agent consists of aldehyde, phenol and aluminum citrate; the aldehyde is one or the combination of benzaldehyde and paraformaldehyde; and the phenol is one or more of phenol, resorcinol and hydroquinone. The water-plugging profile control agent can resist the temperature of 120 DEG C, can be directly prepared by using water with mineralization degree of 150,000 mg / L, and has high crosslinking performance and long-term stability. The preparation method for the water-plugging profile control agent is simple, convenient to operate, and easy to control, and water-plugging profile control agent has a good plugging effect, and construction can be performed after the water-plugging profile control agent is directly prepared on site.

The invention provides a tin-titanium-silicon molecular sieve and a preparation method and application thereof. The tin-titanium-silicon molecular sieve contains elemental silicon, elemental titanium, elemental tin and elemental oxygen, and the interiors of at least a part of crystal grains of the tin-titanium-silicon molecular sieve have hole structures. The invention provides a method for hydroxylation of phenol. The method comprises a step of contacting phenol and hydrogen peroxide with a catalyst under the conditions of phenol hydroxylation, wherein the catalyst contains the tin-titanium-silicon molecular sieve provided by the invention. The tin-titanium-silicon molecular sieve provided by the invention has good catalytic oxidation; if applied to phenol hydroxylation, the tin-titanium-silicon molecular sieve provided has higher catalytic oxidation activity and particularly high selectivity on a para-position product hydroquinone compared with titanium-silicon molecular sieve not containing tin or a tin-loaded titanium-silicon molecular sieve.

The present invention is directed to a golf ball having at least one layer formed from a rubber composition comprising a base rubber, at least 0.05 parts by weight of a free radical initiator, per 100 parts of the base rubber, and at least 0.1 parts by weight of a hydroquinone, per 100 parts of the base rubber. A ratio of the amount of the hydroquinone present in the rubber composition to the amount of free radical initiator present in the rubber composition is generally from 0.05 to 2. The rubber composition may be present in any one or more of a core layer, a cover layer, or an intermediate layer.

The invention relates to a process for preparing polyetheretherketone products, which is characterized in that the process comprises adopting Na2CO3 to be condensating agent, leading 4, 4'- difluorobenzophenone, hydroquinone and diresorcinol to have polymerization reaction, improving the reaction temperature after producing the relative prepolymer, and secondly adding hydroquinone to be chain extender to react for a period of time to prepare polyetheretherketone products with high viscosity.

The invention relates to a novel crude oil demulsifier and a preparation method thereof. The novel crude oil demulsifier is prepared from esterified butyl acrylate acrylic acid copolymer and polyether demulsifier. Calculated according to a total weight of the butyl acrylate acrylic acid copolymer and the polyether demulsifier as 100%, the novel crude oil demulsifier comprises components of, by weight: 10-95% of the butyl acrylate acrylic acid copolymer, 5-90% of the polyether demulsifier, 0.1-3% of an acidic catalyst, 0.1-0.2% of a polymerization inhibitor of hydroquinone, and a solvent which is a good solvent for the butyl acrylate acrylic acid copolymer and the polyether demulsifier. According to the novel crude oil demulsifier and the preparation method thereof, the butyl acrylate acrylic acid copolymer and the polyether demulsifier with demulsification functions are subject to an esterification reaction. The prepared demulsifier provides a good demulsification effect upon crude oil emulsion.

Polycarbonates containing low or undetectable levels of Fries rearrangement products and comprising repeat units derived from one or more of resorcinol, hydroquinone, methylhydroquinone, bisphenol A, and 4,4′-biphenol have been prepared by the melt reaction of one or more of the aforementioned dihydroxy aromatic compounds with an ester-substituted diaryl carbonate such as bis-methyl salicyl carbonate. Low, or in many instances undetectable, levels of Fries rearrangement products are found in the product polycarbonates obtained as the combined result of a highly effective catalyst system which suppresses the Fries reaction and the use of lower melt polymerization temperatures relative to temperatures required for the analogous polymerization reactions using diphenyl carbonate.

The invention discloses a preparation method of graphene fibers. The preparation method comprises the following steps: (1), a mixture of a graphene oxide solution and a water-soluble reducing agent is added into a tubular reactor, wherein the water-soluble reducing agent is one or more of ascorbic acid, sodium ascorbate, sodium citrate, HI, HBr, NaHSO3, Na2S, ethylenediamine, p-phenylenediamine and hydroquinone; (2), the tubular reactor in the step (1) is heated, and graphene oxide is reduced and assembled to aqueous graphene gel fibers, and the heating temperature is 60-95 DEG C; and (3), the aqueous graphene gel fibers obtained in the step (2) is dried to obtain the graphene fibers. The preparation method is simple to operate, mild in conditions and low in raw material cost; and the graphene fibers obtained with the preparation method are uniform in structure, excellent in mechanical property and easiness in functionalization.

A cream base for the topical application of skin care therapeutics and a process for making the cream base. In one embodiment, the therapeutic is tretinoin, hydroquinone and fluocinolone acetonide for the treatment of hyperpigmented skin conditions, such as melasma.

The invention discloses a silicon framework hyperbranched epoxy resin and a preparation method thereof. Firstly, compound A containing two moles of silicon-hydrogen bond, compound B containing three moles of double bond and self-made halloysite supported platinum catalyst are uniformly mixed, and are stirred under the temperature of 30DEG C to 100DEG C to react for 5 to 10 hours, so that the double bond can fully reacts, and thereby hyperbranched organic silicon resin, the end group of which is the silicon-hydrogen bond, is obtained; then, compound C containing a epoxy group is added in the hyperbranched organic silicon resin, and is stirred under the temperature of 60DEG C to 120DEG C to react for 10 to 15 hours until the silicon-hydrogen bond fully reacts, hydroquinone as polymerization inhibitor is then added, and after vacuumization, the silicon framework hyperbranched epoxy resin is obtained. The method has the advantages of simple technique and easily obtained materials, and does need organic solvent and processes such as washing, thus avoiding environment pollution caused by conventional organic solvent and washing for preparing organic silicon resin, and the obtained product is expected to be applied to fields such as the strengthening and toughening of epoxy resin and solventless, low-volatility epoxy resin coating.

A benzoquinone or hydroquinone for use in the topical treatment of a condition which is caused, exacerbated or transmitted by bacterial, in particular staphylococcal or propionibacterial, activity. The condition may be a skin or skin structure condition such as acne. The invention also provides the use of a benzo- or hydroquinone in the manufacture of a medicament for the treatment of such a condition.

The invention relates to a method for preparing a cuprous oxide / bacterial cellulose nano composite material. The preparing method comprises the following steps of: obliquely inoculating acetobacter xylinum strains into culture solution, and culturing the strains to obtain a bacterial cellulose gel film; performing surface activation treatment on the bacterial cellulose gel film in sulfuric acid solution and sodium hypochlorite solution respectively; and sequentially soaking the surface activated bacterial cellulose gel film into Cu(NO3)2 solution and hydroquinone solution to perform reduction reaction to obtain the cuprous oxide / bacterial cellulose nano composite material. The method has the advantages that: the preparation process is simple; and the prepared composite material keeps the nano structure of cuprous oxide particles, simultaneously has good strength performance, and has wide application prospect on the aspects of electrode devices, catalysts, gas sensitive sensors and the like.

The present invention relates to various methods of sensitizing and modifying nanosensor platforms. In one embodiment, the present invention provides a method of increasing sensitivity by inhibiting oxidation of one or more 1,4-hydroquinone (HQ) molecules, functionalizing the nanosensor by using one or more diazonium molecules, creating one or more oxidized carbon groups on the nanosensor, and / or depositing one or more metal clusters on the nanosensor.

A sheet for whitening cosmetics comprises a sheet-like substrate and an adhesive layer which comprises a wet pressure-sensitive adhesive composition formed on the substrate. The whitening component includes vitamin C or its derivatives such as magnesium L-ascorbyl-2-phosphate, vitamin E nicotinate, kojic acid, hydroquinone, ellagic acid, albumin, galenical extracts, and rice bran extracts. Kojic acid and magnesium L-ascorbyl-2-phosphate are preferred. By contacting the adhesive layer with water and / or a hydrophilic medium such as alcohols, e.g., methanol, ethanol, etc., the wet pressure-sensitive adhesive composition exhibits excellent stickiness and excellent applicability to skin as well as excellent whitening effect with alleviating or eliminating stains, freckles, non-transparency, etc. on the skin.

The invention discloses a maigre ham sausage and a preparation method thereof. The maigre ham sausage consists of the following raw materials: textured soybean proteins, ice water, vegetable oil, Konjac powder, albumen powder, modified starch, table salt, white granulated sugar, monosodium glutamate, I+G, maigre meat essence, whey proteins, powdered soy, caramel pigment and TBHQ (Tert-Butyl Hydroquinone). The preparation method comprises the following steps: rehydrating; dehydrating; threading; mixing; filling; cooking and sterilizing; and detecting and putting in a warehouse. The maigre ham sausage disclosed by the invention has the characteristics that by taking textured soybean proteins, Konjac powder, albumen powder and vegetable oil as main raw materials to replace animal meat, besides animal nutritional components, the maigre ham sausage further reduces the fat content of animal, so that the maigre ham sausage is more beneficial to human health; konjac has a certain health-care function, and no nitrite is added; the maigre ham sausage has the characteristics of fine and smooth meat, fresh and tender taste, convenience in carrying, simplicity in eating and long fresh and tender, and is deeply welcomed by massive consumers; the preparation process is simple in flow, the raw materials are cheaper, and the maigre ham sausage is easy to be produced on a large scale.

A cross-linked thermoplastic polyurea is formed by heating a mixture containing a thermoplastic urethane base material, a monomeric and / or polymeric di-isocyanate comprising between 1 to 10% of the total weight of the mixture, and a diamine comprising between 1 to 10% of the total weight of the mixture. A thermoplastic polyurethane may be formed by substituting hydroquinone for the diamine. The mixture is heated to a temperature within the range of 250° F. to 550° F. The heated mixture, which is flowable, is then injected into at least one injection molding device. The mixture is then cured at a temperature between 150° F. to 250° F. for a period of time between 2 and 36 hours. The cross-linked thermoplastic polyurethane / polyurea retains the excellent flowability characteristics of a thermoplastic urethane while the same time exhibits good abrasion, tensile strength, rebound, and compression set characteristics which are similar to those found in thermoset urethanes.

The present invention relates to environment friendly process of synthesizing 1, 4-cyclohexyl dione. The process includes the following steps: 1. preparing skeleton nickel catalyst; 2. preparing 1, 4-cyclohexyl diol with hydroquinone as material and through catalytic hydrogenation under the action of the skeleton nickel catalyst in a high pressure reactor; and 3. oxidizing with hydrogen peroxide or catalytic dehydrogenation to prepare 1, 4-cyclohexyl dione. The present invention is significant in industrial production of 1, 4-cyclohexyl dione, and has the advantages of easy-to-control mild reaction, low cost, environment friendship, easy-to-prepare catalyst with high stability and reusability, and high product yield.